Over reputation area Over 25 locally fly altitudes ol negative reoi T1i nl the qi pj th Pikes Peak 20 M ]EI -to-bi r local line-up eight club RC Club race six low drag pictures o js jointly sponsoring inds better novice iss part reguL ned QM contest n per pians owed Local hobby available Both cli agreed plani left contestant someone otherwise compete because er fly faster airplan minimum five conjunction DOWEL RH PANEL /4 BUTT RIB FIBRE GLASS 5 TA PE Ij -I---4~IIIIII kzjiz~ 1/459/16IIIItIt IIIII Jli ~11-----II 1/1653 SH II III II] II I SPARSIIIjIL HPANEL RIB I/lB I/4CAPIII DIHEDRAL jI I/4BUTT I/IS RIBS IIII lli II II ii IIZEIIII II I/IBII2SH11Ip--- ---------fl----K.I/451IIII I oITh1F IIIIII IIII j1~ 11iL D TWO PANELS BEVEL BUTT RIBS FOR DIHEDRALJDIN WITH EPOSY REINFORCE WITH FIBRE GLASS TAPE 15 ENGINE I/S STOCK6/32 BLIND 1/SPLY ROPELLER 7-4 l/Z TF BEVEL LOWER SHEET EDGE RADIO COMPARTMENT I/4L I/S PLY SERVO RAILS ______________________________________________0 SOLID TI PS IL6-32 NYLON BOLTS __________] II 3/lB DOWEL PUSH RODS SURFACES 3/18 ROUND EDGES j V DRILLL TAP 4-40~IB4-4091 2024T5 ALUMALL 4-4 DRILL 3/IS r NGINEIRHVIEWINCIDENCE&THRUSTOIQ 13/4SPINNER PUSH ROD SLOTS -3/32 TUBING 1/16 PLY NOSE RING-I/lB WIREEPOXIED ---'1/B CROSS WISE SH01/2D FAIRcWING SPAN56AREAI 505 q d R/C SPORT RACER NOSE TO SPINNERWGHT2 1/2 LBS ENG 09S JAYCOCK FEB 1978 FULL-SIZE PLANS AVAILABLESEE PAGE 112 1/2115/451.-MAPLE C 03 C 03 CD CD N tI 7-41/2 15 x 22 b 3/16 BIRCH DOWEL WING HOLD DOWNS IMBED INTO 1/4 BALSA BLOCKS LSA / / / II SQ HARD ALL 3/16 3/ Ti WAL -x 1/2 TI good c 190and arent flM racing havent sk sit Heotkamp supplied fly well look instruction Select two mi 16 X 4 X 36 sheets ote Use cyanoacrylate ept outline onto thei Transfer bulkhe \iselage formers us forniers 2 aii everything square Inwer fuselage h together fus spinner ring bottom fu landing gear blo e Epoxy -tri ring Cut out hitween spinr k so that n e mount c xl for cleara ngine Allow l/3L ick plate t rear glue firewall mount blind nuts ba firewall still place fuel tank t tuselage asi d cut out wire o not ri sturdy construction ir vacant new aparimi 24 nickle chrome plated greater wear resistance Almost crankcases die cast investment cast aluminum heat treated maximum strength piston rings used made high strength centrifugal cast iron used combination chrome plated steel sleeve Almost ideas first used Control Line Speed engines quest superior performance contin uous process Extremely high-nitro con tent fuels devilishly hard engine components ever stronger alloys design improvements developed success such work amply demon strated todays large RC engines develop over one-half horse power 10% nitro fuels run hun dreds hours before parts wear out destruct Most small engines 19 displacement less have cast iron pistons freemachining leaded steel sleeves com bination works very well cast iron wear resistant exhibits low friction cast iron heavy however almost impossible balance larger dis placement engine try use material piston reason engines 40 displacement larger have aluminum pistons ABC ABCD several manufacturers now make what called ABC engines letters stand Aluminum Brass Chrome mean engine has lapped aluminum piston chromeplated brass sleeve aluminum piston special alloy containing 19 22 per cent silicon alloy has much lower coefficient expansion regular aluminum alloys fact brass ex pands aluminum heated proper sleeve piston clear ances maintained operating conditions concept first used Super tigre 65 29 engines about ten years ago believe Dick Hall Huntsville Alabama provided information low-expansion aluminum alloy Mr Garofali worked out technique brass sleeve use racing engines lapped lightweight low-friction pis ton gave tremendous increase horse power side benefits excellent life time elimination long break-in requirements ABC sleeve piston expensive however since high sil icon alloy piston must cast chrome plating difficult hone assembly tolerances very critical reduce some costs some manufacturers made ABCD engines letters ABCD mean Aluminum Brass Chrome Dykes ring combination piston alloy either high silicon aluminum casting 2024-T35 aluminum Instead being lapped piston fitted single compression ring special type called Dykes ring Most piston rings spring loaded against walls cylinder tension creates friction drag continually piston goes up down Dykes ring however fits bore no tension depends combustion pressure force against wall sealing seals gas pressure high floats during remainder stroke great reduction friction Different rings shown Fig 5 may some differences idling characteristics between lapped ABC en gine ringed engine doubt would much detriment would guess such differences would caused change compression idling speeds Perhaps ringed piston leaks slightly low rpm low compression engines seem idle better high com pression ones theory could proven easily measuring com pression high low speeds Combustion Chambers Various combus tion chamber shapes shown Fig 6 Years ago bothered preigni tion went high compression fuels containing 50% nitro flat-top piston eliminated problem now can run extremely high com pression ratios up 80% nitro racing events successful high performance combustion chamber shape shown Fig 6-d used Supertigre engines years Wing span 67The Cuellist 2 40 has Wing chord 14seen designed Total wag area 7g5upeasy-to-f y ann safe Fse age engla 54sanding twin engined Stab lizer span 27H C mooni Combining Veric n tO Velegant appearance Hoc engine 23- 40with simple atrLcturO ta Gear F ann rerractidea tne moceler Ceanne 45w reiIwho has progrenano Control functionstnroga usaa lorons hiecatortrainers pattern Thrott e Redderow wing sport pa Coast act Ba sa 0acazea 35a67 Ins cc onwanaa ann coast oct 05 photos ac aced K acludes Deca balsa anaped pa ta ha owoon plywood a 00 pee ens Owa e d F y ng ght 6 8 05 now used Schnuerle-ported en gines distance top pis ton glow plug has great effect upon engine performance because affects tem perature engine plug other chamber shapes have tried flat area around periphery called squish band set come very close piston top stroke squishes fuel-air charge domed combustion chamber high tur bulence increased efficiency trumpet chamber shown Fig 6-f works very well used extensively Cox Rossi high-performance en gines Some hop-up experts modify squish-band chamber shown Fig 6-e claim better performance really doubt think can get iden tical better performance setting head clearance optimum compres sion ratio weather has great effect racing engines can usually correct variations weather changing compression ratio good tachometer necessary measure engine rpm vary clearance must know what rpm engine should turn required performance Sport RC engines affected weather changes compression adjustments rarely needed ends part next month will cover tuned pipes general descriptions several new engines market Spirits/Aycock continued page 24 Use 6-32 nylon bolts blind nuts hold place use nylon bolts allows gear knock off super hard landing instead tearing up bottom fuselage Epoxy maple wing blocks gussets place Square up wing fuselage drill holes wing dowels bolts See left off block front fuselage Tap blocks nylon bolts Now add forward fuselage block epoxy Install wing dowels Sand shape fuse lage fairing front end spinner Coat engine tank area resin epoxy Weight point should 15 94 Model Aviation ozs Install engine tank spinner Add RC gear locate CG shown plans Use 3/s-in throw surfaces first flights Finish favorite iron-on covering Dont forget elevator connecting wire hinges Flying piece cake airplane can driven down runway take off like car air very honest will anything dont ask Rudder rolls snap fact people will want know hid aile rons Landing dream just set up final bring home Hope too will get much enjoyment out Spirit Springs have RC Aerobatics/VanPutte continued page 25 panied Auto Mix intended situations excessive fuel sup plied engine could result too much muffler pressure applied fuel tank fuel pump set pressure too high use fuel pump standard carburetor other such situations Auto Mix returns excess fuel fuel tank net result engine thinks tank located Auto Mix use fuel pumps standard carbu retor-equipped engines Phoenix 6 airplanes Phoenix tank/engine com bination high tank sidemounted engine results tremendous height difference between centerlines tank carburetor Conse quently engine set good upright operation usually leans out severely airplane flown through verted parts maneuvers use pump engine solves problem However difficult adjust fuel pump pressure high enough guar antee fuel delivery conditions low enough needle valve settings sensitive Up now have settled having little too much pressure sensitive needle valve order guarantee reliable supply fuel Robart Auto Mix has permitted enjoy reliable fuel supply pump provides correspond ingly sensitive needle valve Contrary instructions use three-line system tank vent/overflow line attaches muffler pressure tap fill line taches excess fuel return tap Auto Mix fuel pickup line attaches Perry pump inlet tap subsequently Auto Mix course Auto Mix outlet attaches carburetor called Robart tell what done suggested Maynard Shade reason three-line system worked used Perry pump Presumably use Robart pump would require having two-line system plugging third line Filling tank little different what done previously used fill tank through fill line surprise cap line tank full Now simply remove line carburetor fill through case hadnt guessed now am completely satisfied Robart Auto Mix recommend anyone problems similar described pine trees line runway club flies have claimed share hapless airplanes Since tech nically called Slash Pines no kidding have sorts local stories about air plane eater called Slash grizzled uncle named Graymoss back mind read recent Hear RUDDER ASSEMBLY Aluminum die Available 40 60 boats Easy assemble Comes complete Mounting II Plate Screws Pivot Bracket Rudder Blade Pivot Pin n Bushings Water Pick up aded adjustable 40 60 Rudder iden tical except 60 Rudder Blade er DOUBLE RUDDER OUTDRIVE ASSEMBLY 40 60 boats Aluminum die cast Complete Master Bracket designed twin ribs indi vidual modification 2 Rudder Pivot Brackets 2 Retainer Plates necessary Mounting Screws Washers Also includes Adjustable Strut alled Olite Bushings Pivot Pins n Bushings 3 Control Arms screws 2 Rudder Blades 2 ARB 40 3 ARB 601 SINGIr RUDDER OUTORIVE ASSEMBLY same above except includes 1 Rudder Blade Rud der Pivot Bracket Pivpt Pin control Arm FLEX CABLE DRIVE LINE AND COMPONENTS TEFLON BUSHINGS & WASHERS STUB SHAFTS SHAFT LOG21/2 31/e FERRULES Ye newsletter Valley Forge Signal Seekers Pennsylvania edited Ray Cummings Ray described harrowing experience involving northern variety airplane eaters somewhat ed ited version follows Did ever notice lovely stand timber serves well mark line separation between Pa Turnpike start Park Im sure time another must have heard serene message quiet restling sound back flight line doing thing serve silent witness per formance. quietly waiting. patiently waiting ays waiting As long prevailing winds thing tall trees seem preoccupied January 1979 95 MOTOR MOUNT SET Die cast aluminum complete 5 Master Mount Screws Washers sert Adapter 40 60 engine Inserts can rail mounted boats confined engine placement areas FLEX CABLE AND STUB SHAFT ASSEMBLIES 3]
Edition: Model Aviation - 1979/01
Page Numbers: 20, 21, 22, 23, 24, 94, 95
Over reputation area Over 25 locally fly altitudes ol negative reoi T1i nl the qi pj th Pikes Peak 20 M ]EI -to-bi r local line-up eight club RC Club race six low drag pictures o js jointly sponsoring inds better novice iss part reguL ned QM contest n per pians owed Local hobby available Both cli agreed plani left contestant someone otherwise compete because er fly faster airplan minimum five conjunction DOWEL RH PANEL /4 BUTT RIB FIBRE GLASS 5 TA PE Ij -I---4~IIIIII kzjiz~ 1/459/16IIIItIt IIIII Jli ~11-----II 1/1653 SH II III II] II I SPARSIIIjIL HPANEL RIB I/lB I/4CAPIII DIHEDRAL jI I/4BUTT I/IS RIBS IIII lli II II ii IIZEIIII II I/IBII2SH11Ip--- ---------fl----K.I/451IIII I oITh1F IIIIII IIII j1~ 11iL D TWO PANELS BEVEL BUTT RIBS FOR DIHEDRALJDIN WITH EPOSY REINFORCE WITH FIBRE GLASS TAPE 15 ENGINE I/S STOCK6/32 BLIND 1/SPLY ROPELLER 7-4 l/Z TF BEVEL LOWER SHEET EDGE RADIO COMPARTMENT I/4L I/S PLY SERVO RAILS ______________________________________________0 SOLID TI PS IL6-32 NYLON BOLTS __________] II 3/lB DOWEL PUSH RODS SURFACES 3/18 ROUND EDGES j V DRILLL TAP 4-40~IB4-4091 2024T5 ALUMALL 4-4 DRILL 3/IS r NGINEIRHVIEWINCIDENCE&THRUSTOIQ 13/4SPINNER PUSH ROD SLOTS -3/32 TUBING 1/16 PLY NOSE RING-I/lB WIREEPOXIED ---'1/B CROSS WISE SH01/2D FAIRcWING SPAN56AREAI 505 q d R/C SPORT RACER NOSE TO SPINNERWGHT2 1/2 LBS ENG 09S JAYCOCK FEB 1978 FULL-SIZE PLANS AVAILABLESEE PAGE 112 1/2115/451.-MAPLE C 03 C 03 CD CD N tI 7-41/2 15 x 22 b 3/16 BIRCH DOWEL WING HOLD DOWNS IMBED INTO 1/4 BALSA BLOCKS LSA / / / II SQ HARD ALL 3/16 3/ Ti WAL -x 1/2 TI good c 190and arent flM racing havent sk sit Heotkamp supplied fly well look instruction Select two mi 16 X 4 X 36 sheets ote Use cyanoacrylate ept outline onto thei Transfer bulkhe \iselage formers us forniers 2 aii everything square Inwer fuselage h together fus spinner ring bottom fu landing gear blo e Epoxy -tri ring Cut out hitween spinr k so that n e mount c xl for cleara ngine Allow l/3L ick plate t rear glue firewall mount blind nuts ba firewall still place fuel tank t tuselage asi d cut out wire o not ri sturdy construction ir vacant new aparimi 24 nickle chrome plated greater wear resistance Almost crankcases die cast investment cast aluminum heat treated maximum strength piston rings used made high strength centrifugal cast iron used combination chrome plated steel sleeve Almost ideas first used Control Line Speed engines quest superior performance contin uous process Extremely high-nitro con tent fuels devilishly hard engine components ever stronger alloys design improvements developed success such work amply demon strated todays large RC engines develop over one-half horse power 10% nitro fuels run hun dreds hours before parts wear out destruct Most small engines 19 displacement less have cast iron pistons freemachining leaded steel sleeves com bination works very well cast iron wear resistant exhibits low friction cast iron heavy however almost impossible balance larger dis placement engine try use material piston reason engines 40 displacement larger have aluminum pistons ABC ABCD several manufacturers now make what called ABC engines letters stand Aluminum Brass Chrome mean engine has lapped aluminum piston chromeplated brass sleeve aluminum piston special alloy containing 19 22 per cent silicon alloy has much lower coefficient expansion regular aluminum alloys fact brass ex pands aluminum heated proper sleeve piston clear ances maintained operating conditions concept first used Super tigre 65 29 engines about ten years ago believe Dick Hall Huntsville Alabama provided information low-expansion aluminum alloy Mr Garofali worked out technique brass sleeve use racing engines lapped lightweight low-friction pis ton gave tremendous increase horse power side benefits excellent life time elimination long break-in requirements ABC sleeve piston expensive however since high sil icon alloy piston must cast chrome plating difficult hone assembly tolerances very critical reduce some costs some manufacturers made ABCD engines letters ABCD mean Aluminum Brass Chrome Dykes ring combination piston alloy either high silicon aluminum casting 2024-T35 aluminum Instead being lapped piston fitted single compression ring special type called Dykes ring Most piston rings spring loaded against walls cylinder tension creates friction drag continually piston goes up down Dykes ring however fits bore no tension depends combustion pressure force against wall sealing seals gas pressure high floats during remainder stroke great reduction friction Different rings shown Fig 5 may some differences idling characteristics between lapped ABC en gine ringed engine doubt would much detriment would guess such differences would caused change compression idling speeds Perhaps ringed piston leaks slightly low rpm low compression engines seem idle better high com pression ones theory could proven easily measuring com pression high low speeds Combustion Chambers Various combus tion chamber shapes shown Fig 6 Years ago bothered preigni tion went high compression fuels containing 50% nitro flat-top piston eliminated problem now can run extremely high com pression ratios up 80% nitro racing events successful high performance combustion chamber shape shown Fig 6-d used Supertigre engines years Wing span 67The Cuellist 2 40 has Wing chord 14seen designed Total wag area 7g5upeasy-to-f y ann safe Fse age engla 54sanding twin engined Stab lizer span 27H C mooni Combining Veric n tO Velegant appearance Hoc engine 23- 40with simple atrLcturO ta Gear F ann rerractidea tne moceler Ceanne 45w reiIwho has progrenano Control functionstnroga usaa lorons hiecatortrainers pattern Thrott e Redderow wing sport pa Coast act Ba sa 0acazea 35a67 Ins cc onwanaa ann coast oct 05 photos ac aced K acludes Deca balsa anaped pa ta ha owoon plywood a 00 pee ens Owa e d F y ng ght 6 8 05 now used Schnuerle-ported en gines distance top pis ton glow plug has great effect upon engine performance because affects tem perature engine plug other chamber shapes have tried flat area around periphery called squish band set come very close piston top stroke squishes fuel-air charge domed combustion chamber high tur bulence increased efficiency trumpet chamber shown Fig 6-f works very well used extensively Cox Rossi high-performance en gines Some hop-up experts modify squish-band chamber shown Fig 6-e claim better performance really doubt think can get iden tical better performance setting head clearance optimum compres sion ratio weather has great effect racing engines can usually correct variations weather changing compression ratio good tachometer necessary measure engine rpm vary clearance must know what rpm engine should turn required performance Sport RC engines affected weather changes compression adjustments rarely needed ends part next month will cover tuned pipes general descriptions several new engines market Spirits/Aycock continued page 24 Use 6-32 nylon bolts blind nuts hold place use nylon bolts allows gear knock off super hard landing instead tearing up bottom fuselage Epoxy maple wing blocks gussets place Square up wing fuselage drill holes wing dowels bolts See left off block front fuselage Tap blocks nylon bolts Now add forward fuselage block epoxy Install wing dowels Sand shape fuse lage fairing front end spinner Coat engine tank area resin epoxy Weight point should 15 94 Model Aviation ozs Install engine tank spinner Add RC gear locate CG shown plans Use 3/s-in throw surfaces first flights Finish favorite iron-on covering Dont forget elevator connecting wire hinges Flying piece cake airplane can driven down runway take off like car air very honest will anything dont ask Rudder rolls snap fact people will want know hid aile rons Landing dream just set up final bring home Hope too will get much enjoyment out Spirit Springs have RC Aerobatics/VanPutte continued page 25 panied Auto Mix intended situations excessive fuel sup plied engine could result too much muffler pressure applied fuel tank fuel pump set pressure too high use fuel pump standard carburetor other such situations Auto Mix returns excess fuel fuel tank net result engine thinks tank located Auto Mix use fuel pumps standard carbu retor-equipped engines Phoenix 6 airplanes Phoenix tank/engine com bination high tank sidemounted engine results tremendous height difference between centerlines tank carburetor Conse quently engine set good upright operation usually leans out severely airplane flown through verted parts maneuvers use pump engine solves problem However difficult adjust fuel pump pressure high enough guar antee fuel delivery conditions low enough needle valve settings sensitive Up now have settled having little too much pressure sensitive needle valve order guarantee reliable supply fuel Robart Auto Mix has permitted enjoy reliable fuel supply pump provides correspond ingly sensitive needle valve Contrary instructions use three-line system tank vent/overflow line attaches muffler pressure tap fill line taches excess fuel return tap Auto Mix fuel pickup line attaches Perry pump inlet tap subsequently Auto Mix course Auto Mix outlet attaches carburetor called Robart tell what done suggested Maynard Shade reason three-line system worked used Perry pump Presumably use Robart pump would require having two-line system plugging third line Filling tank little different what done previously used fill tank through fill line surprise cap line tank full Now simply remove line carburetor fill through case hadnt guessed now am completely satisfied Robart Auto Mix recommend anyone problems similar described pine trees line runway club flies have claimed share hapless airplanes Since tech nically called Slash Pines no kidding have sorts local stories about air plane eater called Slash grizzled uncle named Graymoss back mind read recent Hear RUDDER ASSEMBLY Aluminum die Available 40 60 boats Easy assemble Comes complete Mounting II Plate Screws Pivot Bracket Rudder Blade Pivot Pin n Bushings Water Pick up aded adjustable 40 60 Rudder iden tical except 60 Rudder Blade er DOUBLE RUDDER OUTDRIVE ASSEMBLY 40 60 boats Aluminum die cast Complete Master Bracket designed twin ribs indi vidual modification 2 Rudder Pivot Brackets 2 Retainer Plates necessary Mounting Screws Washers Also includes Adjustable Strut alled Olite Bushings Pivot Pins n Bushings 3 Control Arms screws 2 Rudder Blades 2 ARB 40 3 ARB 601 SINGIr RUDDER OUTORIVE ASSEMBLY same above except includes 1 Rudder Blade Rud der Pivot Bracket Pivpt Pin control Arm FLEX CABLE DRIVE LINE AND COMPONENTS TEFLON BUSHINGS & WASHERS STUB SHAFTS SHAFT LOG21/2 31/e FERRULES Ye newsletter Valley Forge Signal Seekers Pennsylvania edited Ray Cummings Ray described harrowing experience involving northern variety airplane eaters somewhat ed ited version follows Did ever notice lovely stand timber serves well mark line separation between Pa Turnpike start Park Im sure time another must have heard serene message quiet restling sound back flight line doing thing serve silent witness per formance. quietly waiting. patiently waiting ays waiting As long prevailing winds thing tall trees seem preoccupied January 1979 95 MOTOR MOUNT SET Die cast aluminum complete 5 Master Mount Screws Washers sert Adapter 40 60 engine Inserts can rail mounted boats confined engine placement areas FLEX CABLE AND STUB SHAFT ASSEMBLIES 3]
Edition: Model Aviation - 1979/01
Page Numbers: 20, 21, 22, 23, 24, 94, 95
Over reputation area Over 25 locally fly altitudes ol negative reoi T1i nl the qi pj th Pikes Peak 20 M ]EI -to-bi r local line-up eight club RC Club race six low drag pictures o js jointly sponsoring inds better novice iss part reguL ned QM contest n per pians owed Local hobby available Both cli agreed plani left contestant someone otherwise compete because er fly faster airplan minimum five conjunction DOWEL RH PANEL /4 BUTT RIB FIBRE GLASS 5 TA PE Ij -I---4~IIIIII kzjiz~ 1/459/16IIIItIt IIIII Jli ~11-----II 1/1653 SH II III II] II I SPARSIIIjIL HPANEL RIB I/lB I/4CAPIII DIHEDRAL jI I/4BUTT I/IS RIBS IIII lli II II ii IIZEIIII II I/IBII2SH11Ip--- ---------fl----K.I/451IIII I oITh1F IIIIII IIII j1~ 11iL D TWO PANELS BEVEL BUTT RIBS FOR DIHEDRALJDIN WITH EPOSY REINFORCE WITH FIBRE GLASS TAPE 15 ENGINE I/S STOCK6/32 BLIND 1/SPLY ROPELLER 7-4 l/Z TF BEVEL LOWER SHEET EDGE RADIO COMPARTMENT I/4L I/S PLY SERVO RAILS ______________________________________________0 SOLID TI PS IL6-32 NYLON BOLTS __________] II 3/lB DOWEL PUSH RODS SURFACES 3/18 ROUND EDGES j V DRILLL TAP 4-40~IB4-4091 2024T5 ALUMALL 4-4 DRILL 3/IS r NGINEIRHVIEWINCIDENCE&THRUSTOIQ 13/4SPINNER PUSH ROD SLOTS -3/32 TUBING 1/16 PLY NOSE RING-I/lB WIREEPOXIED ---'1/B CROSS WISE SH01/2D FAIRcWING SPAN56AREAI 505 q d R/C SPORT RACER NOSE TO SPINNERWGHT2 1/2 LBS ENG 09S JAYCOCK FEB 1978 FULL-SIZE PLANS AVAILABLESEE PAGE 112 1/2115/451.-MAPLE C 03 C 03 CD CD N tI 7-41/2 15 x 22 b 3/16 BIRCH DOWEL WING HOLD DOWNS IMBED INTO 1/4 BALSA BLOCKS LSA / / / II SQ HARD ALL 3/16 3/ Ti WAL -x 1/2 TI good c 190and arent flM racing havent sk sit Heotkamp supplied fly well look instruction Select two mi 16 X 4 X 36 sheets ote Use cyanoacrylate ept outline onto thei Transfer bulkhe \iselage formers us forniers 2 aii everything square Inwer fuselage h together fus spinner ring bottom fu landing gear blo e Epoxy -tri ring Cut out hitween spinr k so that n e mount c xl for cleara ngine Allow l/3L ick plate t rear glue firewall mount blind nuts ba firewall still place fuel tank t tuselage asi d cut out wire o not ri sturdy construction ir vacant new aparimi 24 nickle chrome plated greater wear resistance Almost crankcases die cast investment cast aluminum heat treated maximum strength piston rings used made high strength centrifugal cast iron used combination chrome plated steel sleeve Almost ideas first used Control Line Speed engines quest superior performance contin uous process Extremely high-nitro con tent fuels devilishly hard engine components ever stronger alloys design improvements developed success such work amply demon strated todays large RC engines develop over one-half horse power 10% nitro fuels run hun dreds hours before parts wear out destruct Most small engines 19 displacement less have cast iron pistons freemachining leaded steel sleeves com bination works very well cast iron wear resistant exhibits low friction cast iron heavy however almost impossible balance larger dis placement engine try use material piston reason engines 40 displacement larger have aluminum pistons ABC ABCD several manufacturers now make what called ABC engines letters stand Aluminum Brass Chrome mean engine has lapped aluminum piston chromeplated brass sleeve aluminum piston special alloy containing 19 22 per cent silicon alloy has much lower coefficient expansion regular aluminum alloys fact brass ex pands aluminum heated proper sleeve piston clear ances maintained operating conditions concept first used Super tigre 65 29 engines about ten years ago believe Dick Hall Huntsville Alabama provided information low-expansion aluminum alloy Mr Garofali worked out technique brass sleeve use racing engines lapped lightweight low-friction pis ton gave tremendous increase horse power side benefits excellent life time elimination long break-in requirements ABC sleeve piston expensive however since high sil icon alloy piston must cast chrome plating difficult hone assembly tolerances very critical reduce some costs some manufacturers made ABCD engines letters ABCD mean Aluminum Brass Chrome Dykes ring combination piston alloy either high silicon aluminum casting 2024-T35 aluminum Instead being lapped piston fitted single compression ring special type called Dykes ring Most piston rings spring loaded against walls cylinder tension creates friction drag continually piston goes up down Dykes ring however fits bore no tension depends combustion pressure force against wall sealing seals gas pressure high floats during remainder stroke great reduction friction Different rings shown Fig 5 may some differences idling characteristics between lapped ABC en gine ringed engine doubt would much detriment would guess such differences would caused change compression idling speeds Perhaps ringed piston leaks slightly low rpm low compression engines seem idle better high com pression ones theory could proven easily measuring com pression high low speeds Combustion Chambers Various combus tion chamber shapes shown Fig 6 Years ago bothered preigni tion went high compression fuels containing 50% nitro flat-top piston eliminated problem now can run extremely high com pression ratios up 80% nitro racing events successful high performance combustion chamber shape shown Fig 6-d used Supertigre engines years Wing span 67The Cuellist 2 40 has Wing chord 14seen designed Total wag area 7g5upeasy-to-f y ann safe Fse age engla 54sanding twin engined Stab lizer span 27H C mooni Combining Veric n tO Velegant appearance Hoc engine 23- 40with simple atrLcturO ta Gear F ann rerractidea tne moceler Ceanne 45w reiIwho has progrenano Control functionstnroga usaa lorons hiecatortrainers pattern Thrott e Redderow wing sport pa Coast act Ba sa 0acazea 35a67 Ins cc onwanaa ann coast oct 05 photos ac aced K acludes Deca balsa anaped pa ta ha owoon plywood a 00 pee ens Owa e d F y ng ght 6 8 05 now used Schnuerle-ported en gines distance top pis ton glow plug has great effect upon engine performance because affects tem perature engine plug other chamber shapes have tried flat area around periphery called squish band set come very close piston top stroke squishes fuel-air charge domed combustion chamber high tur bulence increased efficiency trumpet chamber shown Fig 6-f works very well used extensively Cox Rossi high-performance en gines Some hop-up experts modify squish-band chamber shown Fig 6-e claim better performance really doubt think can get iden tical better performance setting head clearance optimum compres sion ratio weather has great effect racing engines can usually correct variations weather changing compression ratio good tachometer necessary measure engine rpm vary clearance must know what rpm engine should turn required performance Sport RC engines affected weather changes compression adjustments rarely needed ends part next month will cover tuned pipes general descriptions several new engines market Spirits/Aycock continued page 24 Use 6-32 nylon bolts blind nuts hold place use nylon bolts allows gear knock off super hard landing instead tearing up bottom fuselage Epoxy maple wing blocks gussets place Square up wing fuselage drill holes wing dowels bolts See left off block front fuselage Tap blocks nylon bolts Now add forward fuselage block epoxy Install wing dowels Sand shape fuse lage fairing front end spinner Coat engine tank area resin epoxy Weight point should 15 94 Model Aviation ozs Install engine tank spinner Add RC gear locate CG shown plans Use 3/s-in throw surfaces first flights Finish favorite iron-on covering Dont forget elevator connecting wire hinges Flying piece cake airplane can driven down runway take off like car air very honest will anything dont ask Rudder rolls snap fact people will want know hid aile rons Landing dream just set up final bring home Hope too will get much enjoyment out Spirit Springs have RC Aerobatics/VanPutte continued page 25 panied Auto Mix intended situations excessive fuel sup plied engine could result too much muffler pressure applied fuel tank fuel pump set pressure too high use fuel pump standard carburetor other such situations Auto Mix returns excess fuel fuel tank net result engine thinks tank located Auto Mix use fuel pumps standard carbu retor-equipped engines Phoenix 6 airplanes Phoenix tank/engine com bination high tank sidemounted engine results tremendous height difference between centerlines tank carburetor Conse quently engine set good upright operation usually leans out severely airplane flown through verted parts maneuvers use pump engine solves problem However difficult adjust fuel pump pressure high enough guar antee fuel delivery conditions low enough needle valve settings sensitive Up now have settled having little too much pressure sensitive needle valve order guarantee reliable supply fuel Robart Auto Mix has permitted enjoy reliable fuel supply pump provides correspond ingly sensitive needle valve Contrary instructions use three-line system tank vent/overflow line attaches muffler pressure tap fill line taches excess fuel return tap Auto Mix fuel pickup line attaches Perry pump inlet tap subsequently Auto Mix course Auto Mix outlet attaches carburetor called Robart tell what done suggested Maynard Shade reason three-line system worked used Perry pump Presumably use Robart pump would require having two-line system plugging third line Filling tank little different what done previously used fill tank through fill line surprise cap line tank full Now simply remove line carburetor fill through case hadnt guessed now am completely satisfied Robart Auto Mix recommend anyone problems similar described pine trees line runway club flies have claimed share hapless airplanes Since tech nically called Slash Pines no kidding have sorts local stories about air plane eater called Slash grizzled uncle named Graymoss back mind read recent Hear RUDDER ASSEMBLY Aluminum die Available 40 60 boats Easy assemble Comes complete Mounting II Plate Screws Pivot Bracket Rudder Blade Pivot Pin n Bushings Water Pick up aded adjustable 40 60 Rudder iden tical except 60 Rudder Blade er DOUBLE RUDDER OUTDRIVE ASSEMBLY 40 60 boats Aluminum die cast Complete Master Bracket designed twin ribs indi vidual modification 2 Rudder Pivot Brackets 2 Retainer Plates necessary Mounting Screws Washers Also includes Adjustable Strut alled Olite Bushings Pivot Pins n Bushings 3 Control Arms screws 2 Rudder Blades 2 ARB 40 3 ARB 601 SINGIr RUDDER OUTORIVE ASSEMBLY same above except includes 1 Rudder Blade Rud der Pivot Bracket Pivpt Pin control Arm FLEX CABLE DRIVE LINE AND COMPONENTS TEFLON BUSHINGS & WASHERS STUB SHAFTS SHAFT LOG21/2 31/e FERRULES Ye newsletter Valley Forge Signal Seekers Pennsylvania edited Ray Cummings Ray described harrowing experience involving northern variety airplane eaters somewhat ed ited version follows Did ever notice lovely stand timber serves well mark line separation between Pa Turnpike start Park Im sure time another must have heard serene message quiet restling sound back flight line doing thing serve silent witness per formance. quietly waiting. patiently waiting ays waiting As long prevailing winds thing tall trees seem preoccupied January 1979 95 MOTOR MOUNT SET Die cast aluminum complete 5 Master Mount Screws Washers sert Adapter 40 60 engine Inserts can rail mounted boats confined engine placement areas FLEX CABLE AND STUB SHAFT ASSEMBLIES 3]
Edition: Model Aviation - 1979/01
Page Numbers: 20, 21, 22, 23, 24, 94, 95
Over reputation area Over 25 locally fly altitudes ol negative reoi T1i nl the qi pj th Pikes Peak 20 M ]EI -to-bi r local line-up eight club RC Club race six low drag pictures o js jointly sponsoring inds better novice iss part reguL ned QM contest n per pians owed Local hobby available Both cli agreed plani left contestant someone otherwise compete because er fly faster airplan minimum five conjunction DOWEL RH PANEL /4 BUTT RIB FIBRE GLASS 5 TA PE Ij -I---4~IIIIII kzjiz~ 1/459/16IIIItIt IIIII Jli ~11-----II 1/1653 SH II III II] II I SPARSIIIjIL HPANEL RIB I/lB I/4CAPIII DIHEDRAL jI I/4BUTT I/IS RIBS IIII lli II II ii IIZEIIII II I/IBII2SH11Ip--- ---------fl----K.I/451IIII I oITh1F IIIIII IIII j1~ 11iL D TWO PANELS BEVEL BUTT RIBS FOR DIHEDRALJDIN WITH EPOSY REINFORCE WITH FIBRE GLASS TAPE 15 ENGINE I/S STOCK6/32 BLIND 1/SPLY ROPELLER 7-4 l/Z TF BEVEL LOWER SHEET EDGE RADIO COMPARTMENT I/4L I/S PLY SERVO RAILS ______________________________________________0 SOLID TI PS IL6-32 NYLON BOLTS __________] II 3/lB DOWEL PUSH RODS SURFACES 3/18 ROUND EDGES j V DRILLL TAP 4-40~IB4-4091 2024T5 ALUMALL 4-4 DRILL 3/IS r NGINEIRHVIEWINCIDENCE&THRUSTOIQ 13/4SPINNER PUSH ROD SLOTS -3/32 TUBING 1/16 PLY NOSE RING-I/lB WIREEPOXIED ---'1/B CROSS WISE SH01/2D FAIRcWING SPAN56AREAI 505 q d R/C SPORT RACER NOSE TO SPINNERWGHT2 1/2 LBS ENG 09S JAYCOCK FEB 1978 FULL-SIZE PLANS AVAILABLESEE PAGE 112 1/2115/451.-MAPLE C 03 C 03 CD CD N tI 7-41/2 15 x 22 b 3/16 BIRCH DOWEL WING HOLD DOWNS IMBED INTO 1/4 BALSA BLOCKS LSA / / / II SQ HARD ALL 3/16 3/ Ti WAL -x 1/2 TI good c 190and arent flM racing havent sk sit Heotkamp supplied fly well look instruction Select two mi 16 X 4 X 36 sheets ote Use cyanoacrylate ept outline onto thei Transfer bulkhe \iselage formers us forniers 2 aii everything square Inwer fuselage h together fus spinner ring bottom fu landing gear blo e Epoxy -tri ring Cut out hitween spinr k so that n e mount c xl for cleara ngine Allow l/3L ick plate t rear glue firewall mount blind nuts ba firewall still place fuel tank t tuselage asi d cut out wire o not ri sturdy construction ir vacant new aparimi 24 nickle chrome plated greater wear resistance Almost crankcases die cast investment cast aluminum heat treated maximum strength piston rings used made high strength centrifugal cast iron used combination chrome plated steel sleeve Almost ideas first used Control Line Speed engines quest superior performance contin uous process Extremely high-nitro con tent fuels devilishly hard engine components ever stronger alloys design improvements developed success such work amply demon strated todays large RC engines develop over one-half horse power 10% nitro fuels run hun dreds hours before parts wear out destruct Most small engines 19 displacement less have cast iron pistons freemachining leaded steel sleeves com bination works very well cast iron wear resistant exhibits low friction cast iron heavy however almost impossible balance larger dis placement engine try use material piston reason engines 40 displacement larger have aluminum pistons ABC ABCD several manufacturers now make what called ABC engines letters stand Aluminum Brass Chrome mean engine has lapped aluminum piston chromeplated brass sleeve aluminum piston special alloy containing 19 22 per cent silicon alloy has much lower coefficient expansion regular aluminum alloys fact brass ex pands aluminum heated proper sleeve piston clear ances maintained operating conditions concept first used Super tigre 65 29 engines about ten years ago believe Dick Hall Huntsville Alabama provided information low-expansion aluminum alloy Mr Garofali worked out technique brass sleeve use racing engines lapped lightweight low-friction pis ton gave tremendous increase horse power side benefits excellent life time elimination long break-in requirements ABC sleeve piston expensive however since high sil icon alloy piston must cast chrome plating difficult hone assembly tolerances very critical reduce some costs some manufacturers made ABCD engines letters ABCD mean Aluminum Brass Chrome Dykes ring combination piston alloy either high silicon aluminum casting 2024-T35 aluminum Instead being lapped piston fitted single compression ring special type called Dykes ring Most piston rings spring loaded against walls cylinder tension creates friction drag continually piston goes up down Dykes ring however fits bore no tension depends combustion pressure force against wall sealing seals gas pressure high floats during remainder stroke great reduction friction Different rings shown Fig 5 may some differences idling characteristics between lapped ABC en gine ringed engine doubt would much detriment would guess such differences would caused change compression idling speeds Perhaps ringed piston leaks slightly low rpm low compression engines seem idle better high com pression ones theory could proven easily measuring com pression high low speeds Combustion Chambers Various combus tion chamber shapes shown Fig 6 Years ago bothered preigni tion went high compression fuels containing 50% nitro flat-top piston eliminated problem now can run extremely high com pression ratios up 80% nitro racing events successful high performance combustion chamber shape shown Fig 6-d used Supertigre engines years Wing span 67The Cuellist 2 40 has Wing chord 14seen designed Total wag area 7g5upeasy-to-f y ann safe Fse age engla 54sanding twin engined Stab lizer span 27H C mooni Combining Veric n tO Velegant appearance Hoc engine 23- 40with simple atrLcturO ta Gear F ann rerractidea tne moceler Ceanne 45w reiIwho has progrenano Control functionstnroga usaa lorons hiecatortrainers pattern Thrott e Redderow wing sport pa Coast act Ba sa 0acazea 35a67 Ins cc onwanaa ann coast oct 05 photos ac aced K acludes Deca balsa anaped pa ta ha owoon plywood a 00 pee ens Owa e d F y ng ght 6 8 05 now used Schnuerle-ported en gines distance top pis ton glow plug has great effect upon engine performance because affects tem perature engine plug other chamber shapes have tried flat area around periphery called squish band set come very close piston top stroke squishes fuel-air charge domed combustion chamber high tur bulence increased efficiency trumpet chamber shown Fig 6-f works very well used extensively Cox Rossi high-performance en gines Some hop-up experts modify squish-band chamber shown Fig 6-e claim better performance really doubt think can get iden tical better performance setting head clearance optimum compres sion ratio weather has great effect racing engines can usually correct variations weather changing compression ratio good tachometer necessary measure engine rpm vary clearance must know what rpm engine should turn required performance Sport RC engines affected weather changes compression adjustments rarely needed ends part next month will cover tuned pipes general descriptions several new engines market Spirits/Aycock continued page 24 Use 6-32 nylon bolts blind nuts hold place use nylon bolts allows gear knock off super hard landing instead tearing up bottom fuselage Epoxy maple wing blocks gussets place Square up wing fuselage drill holes wing dowels bolts See left off block front fuselage Tap blocks nylon bolts Now add forward fuselage block epoxy Install wing dowels Sand shape fuse lage fairing front end spinner Coat engine tank area resin epoxy Weight point should 15 94 Model Aviation ozs Install engine tank spinner Add RC gear locate CG shown plans Use 3/s-in throw surfaces first flights Finish favorite iron-on covering Dont forget elevator connecting wire hinges Flying piece cake airplane can driven down runway take off like car air very honest will anything dont ask Rudder rolls snap fact people will want know hid aile rons Landing dream just set up final bring home Hope too will get much enjoyment out Spirit Springs have RC Aerobatics/VanPutte continued page 25 panied Auto Mix intended situations excessive fuel sup plied engine could result too much muffler pressure applied fuel tank fuel pump set pressure too high use fuel pump standard carburetor other such situations Auto Mix returns excess fuel fuel tank net result engine thinks tank located Auto Mix use fuel pumps standard carbu retor-equipped engines Phoenix 6 airplanes Phoenix tank/engine com bination high tank sidemounted engine results tremendous height difference between centerlines tank carburetor Conse quently engine set good upright operation usually leans out severely airplane flown through verted parts maneuvers use pump engine solves problem However difficult adjust fuel pump pressure high enough guar antee fuel delivery conditions low enough needle valve settings sensitive Up now have settled having little too much pressure sensitive needle valve order guarantee reliable supply fuel Robart Auto Mix has permitted enjoy reliable fuel supply pump provides correspond ingly sensitive needle valve Contrary instructions use three-line system tank vent/overflow line attaches muffler pressure tap fill line taches excess fuel return tap Auto Mix fuel pickup line attaches Perry pump inlet tap subsequently Auto Mix course Auto Mix outlet attaches carburetor called Robart tell what done suggested Maynard Shade reason three-line system worked used Perry pump Presumably use Robart pump would require having two-line system plugging third line Filling tank little different what done previously used fill tank through fill line surprise cap line tank full Now simply remove line carburetor fill through case hadnt guessed now am completely satisfied Robart Auto Mix recommend anyone problems similar described pine trees line runway club flies have claimed share hapless airplanes Since tech nically called Slash Pines no kidding have sorts local stories about air plane eater called Slash grizzled uncle named Graymoss back mind read recent Hear RUDDER ASSEMBLY Aluminum die Available 40 60 boats Easy assemble Comes complete Mounting II Plate Screws Pivot Bracket Rudder Blade Pivot Pin n Bushings Water Pick up aded adjustable 40 60 Rudder iden tical except 60 Rudder Blade er DOUBLE RUDDER OUTDRIVE ASSEMBLY 40 60 boats Aluminum die cast Complete Master Bracket designed twin ribs indi vidual modification 2 Rudder Pivot Brackets 2 Retainer Plates necessary Mounting Screws Washers Also includes Adjustable Strut alled Olite Bushings Pivot Pins n Bushings 3 Control Arms screws 2 Rudder Blades 2 ARB 40 3 ARB 601 SINGIr RUDDER OUTORIVE ASSEMBLY same above except includes 1 Rudder Blade Rud der Pivot Bracket Pivpt Pin control Arm FLEX CABLE DRIVE LINE AND COMPONENTS TEFLON BUSHINGS & WASHERS STUB SHAFTS SHAFT LOG21/2 31/e FERRULES Ye newsletter Valley Forge Signal Seekers Pennsylvania edited Ray Cummings Ray described harrowing experience involving northern variety airplane eaters somewhat ed ited version follows Did ever notice lovely stand timber serves well mark line separation between Pa Turnpike start Park Im sure time another must have heard serene message quiet restling sound back flight line doing thing serve silent witness per formance. quietly waiting. patiently waiting ays waiting As long prevailing winds thing tall trees seem preoccupied January 1979 95 MOTOR MOUNT SET Die cast aluminum complete 5 Master Mount Screws Washers sert Adapter 40 60 engine Inserts can rail mounted boats confined engine placement areas FLEX CABLE AND STUB SHAFT ASSEMBLIES 3]
Edition: Model Aviation - 1979/01
Page Numbers: 20, 21, 22, 23, 24, 94, 95
Over reputation area Over 25 locally fly altitudes ol negative reoi T1i nl the qi pj th Pikes Peak 20 M ]EI -to-bi r local line-up eight club RC Club race six low drag pictures o js jointly sponsoring inds better novice iss part reguL ned QM contest n per pians owed Local hobby available Both cli agreed plani left contestant someone otherwise compete because er fly faster airplan minimum five conjunction DOWEL RH PANEL /4 BUTT RIB FIBRE GLASS 5 TA PE Ij -I---4~IIIIII kzjiz~ 1/459/16IIIItIt IIIII Jli ~11-----II 1/1653 SH II III II] II I SPARSIIIjIL HPANEL RIB I/lB I/4CAPIII DIHEDRAL jI I/4BUTT I/IS RIBS IIII lli II II ii IIZEIIII II I/IBII2SH11Ip--- ---------fl----K.I/451IIII I oITh1F IIIIII IIII j1~ 11iL D TWO PANELS BEVEL BUTT RIBS FOR DIHEDRALJDIN WITH EPOSY REINFORCE WITH FIBRE GLASS TAPE 15 ENGINE I/S STOCK6/32 BLIND 1/SPLY ROPELLER 7-4 l/Z TF BEVEL LOWER SHEET EDGE RADIO COMPARTMENT I/4L I/S PLY SERVO RAILS ______________________________________________0 SOLID TI PS IL6-32 NYLON BOLTS __________] II 3/lB DOWEL PUSH RODS SURFACES 3/18 ROUND EDGES j V DRILLL TAP 4-40~IB4-4091 2024T5 ALUMALL 4-4 DRILL 3/IS r NGINEIRHVIEWINCIDENCE&THRUSTOIQ 13/4SPINNER PUSH ROD SLOTS -3/32 TUBING 1/16 PLY NOSE RING-I/lB WIREEPOXIED ---'1/B CROSS WISE SH01/2D FAIRcWING SPAN56AREAI 505 q d R/C SPORT RACER NOSE TO SPINNERWGHT2 1/2 LBS ENG 09S JAYCOCK FEB 1978 FULL-SIZE PLANS AVAILABLESEE PAGE 112 1/2115/451.-MAPLE C 03 C 03 CD CD N tI 7-41/2 15 x 22 b 3/16 BIRCH DOWEL WING HOLD DOWNS IMBED INTO 1/4 BALSA BLOCKS LSA / / / II SQ HARD ALL 3/16 3/ Ti WAL -x 1/2 TI good c 190and arent flM racing havent sk sit Heotkamp supplied fly well look instruction Select two mi 16 X 4 X 36 sheets ote Use cyanoacrylate ept outline onto thei Transfer bulkhe \iselage formers us forniers 2 aii everything square Inwer fuselage h together fus spinner ring bottom fu landing gear blo e Epoxy -tri ring Cut out hitween spinr k so that n e mount c xl for cleara ngine Allow l/3L ick plate t rear glue firewall mount blind nuts ba firewall still place fuel tank t tuselage asi d cut out wire o not ri sturdy construction ir vacant new aparimi 24 nickle chrome plated greater wear resistance Almost crankcases die cast investment cast aluminum heat treated maximum strength piston rings used made high strength centrifugal cast iron used combination chrome plated steel sleeve Almost ideas first used Control Line Speed engines quest superior performance contin uous process Extremely high-nitro con tent fuels devilishly hard engine components ever stronger alloys design improvements developed success such work amply demon strated todays large RC engines develop over one-half horse power 10% nitro fuels run hun dreds hours before parts wear out destruct Most small engines 19 displacement less have cast iron pistons freemachining leaded steel sleeves com bination works very well cast iron wear resistant exhibits low friction cast iron heavy however almost impossible balance larger dis placement engine try use material piston reason engines 40 displacement larger have aluminum pistons ABC ABCD several manufacturers now make what called ABC engines letters stand Aluminum Brass Chrome mean engine has lapped aluminum piston chromeplated brass sleeve aluminum piston special alloy containing 19 22 per cent silicon alloy has much lower coefficient expansion regular aluminum alloys fact brass ex pands aluminum heated proper sleeve piston clear ances maintained operating conditions concept first used Super tigre 65 29 engines about ten years ago believe Dick Hall Huntsville Alabama provided information low-expansion aluminum alloy Mr Garofali worked out technique brass sleeve use racing engines lapped lightweight low-friction pis ton gave tremendous increase horse power side benefits excellent life time elimination long break-in requirements ABC sleeve piston expensive however since high sil icon alloy piston must cast chrome plating difficult hone assembly tolerances very critical reduce some costs some manufacturers made ABCD engines letters ABCD mean Aluminum Brass Chrome Dykes ring combination piston alloy either high silicon aluminum casting 2024-T35 aluminum Instead being lapped piston fitted single compression ring special type called Dykes ring Most piston rings spring loaded against walls cylinder tension creates friction drag continually piston goes up down Dykes ring however fits bore no tension depends combustion pressure force against wall sealing seals gas pressure high floats during remainder stroke great reduction friction Different rings shown Fig 5 may some differences idling characteristics between lapped ABC en gine ringed engine doubt would much detriment would guess such differences would caused change compression idling speeds Perhaps ringed piston leaks slightly low rpm low compression engines seem idle better high com pression ones theory could proven easily measuring com pression high low speeds Combustion Chambers Various combus tion chamber shapes shown Fig 6 Years ago bothered preigni tion went high compression fuels containing 50% nitro flat-top piston eliminated problem now can run extremely high com pression ratios up 80% nitro racing events successful high performance combustion chamber shape shown Fig 6-d used Supertigre engines years Wing span 67The Cuellist 2 40 has Wing chord 14seen designed Total wag area 7g5upeasy-to-f y ann safe Fse age engla 54sanding twin engined Stab lizer span 27H C mooni Combining Veric n tO Velegant appearance Hoc engine 23- 40with simple atrLcturO ta Gear F ann rerractidea tne moceler Ceanne 45w reiIwho has progrenano Control functionstnroga usaa lorons hiecatortrainers pattern Thrott e Redderow wing sport pa Coast act Ba sa 0acazea 35a67 Ins cc onwanaa ann coast oct 05 photos ac aced K acludes Deca balsa anaped pa ta ha owoon plywood a 00 pee ens Owa e d F y ng ght 6 8 05 now used Schnuerle-ported en gines distance top pis ton glow plug has great effect upon engine performance because affects tem perature engine plug other chamber shapes have tried flat area around periphery called squish band set come very close piston top stroke squishes fuel-air charge domed combustion chamber high tur bulence increased efficiency trumpet chamber shown Fig 6-f works very well used extensively Cox Rossi high-performance en gines Some hop-up experts modify squish-band chamber shown Fig 6-e claim better performance really doubt think can get iden tical better performance setting head clearance optimum compres sion ratio weather has great effect racing engines can usually correct variations weather changing compression ratio good tachometer necessary measure engine rpm vary clearance must know what rpm engine should turn required performance Sport RC engines affected weather changes compression adjustments rarely needed ends part next month will cover tuned pipes general descriptions several new engines market Spirits/Aycock continued page 24 Use 6-32 nylon bolts blind nuts hold place use nylon bolts allows gear knock off super hard landing instead tearing up bottom fuselage Epoxy maple wing blocks gussets place Square up wing fuselage drill holes wing dowels bolts See left off block front fuselage Tap blocks nylon bolts Now add forward fuselage block epoxy Install wing dowels Sand shape fuse lage fairing front end spinner Coat engine tank area resin epoxy Weight point should 15 94 Model Aviation ozs Install engine tank spinner Add RC gear locate CG shown plans Use 3/s-in throw surfaces first flights Finish favorite iron-on covering Dont forget elevator connecting wire hinges Flying piece cake airplane can driven down runway take off like car air very honest will anything dont ask Rudder rolls snap fact people will want know hid aile rons Landing dream just set up final bring home Hope too will get much enjoyment out Spirit Springs have RC Aerobatics/VanPutte continued page 25 panied Auto Mix intended situations excessive fuel sup plied engine could result too much muffler pressure applied fuel tank fuel pump set pressure too high use fuel pump standard carburetor other such situations Auto Mix returns excess fuel fuel tank net result engine thinks tank located Auto Mix use fuel pumps standard carbu retor-equipped engines Phoenix 6 airplanes Phoenix tank/engine com bination high tank sidemounted engine results tremendous height difference between centerlines tank carburetor Conse quently engine set good upright operation usually leans out severely airplane flown through verted parts maneuvers use pump engine solves problem However difficult adjust fuel pump pressure high enough guar antee fuel delivery conditions low enough needle valve settings sensitive Up now have settled having little too much pressure sensitive needle valve order guarantee reliable supply fuel Robart Auto Mix has permitted enjoy reliable fuel supply pump provides correspond ingly sensitive needle valve Contrary instructions use three-line system tank vent/overflow line attaches muffler pressure tap fill line taches excess fuel return tap Auto Mix fuel pickup line attaches Perry pump inlet tap subsequently Auto Mix course Auto Mix outlet attaches carburetor called Robart tell what done suggested Maynard Shade reason three-line system worked used Perry pump Presumably use Robart pump would require having two-line system plugging third line Filling tank little different what done previously used fill tank through fill line surprise cap line tank full Now simply remove line carburetor fill through case hadnt guessed now am completely satisfied Robart Auto Mix recommend anyone problems similar described pine trees line runway club flies have claimed share hapless airplanes Since tech nically called Slash Pines no kidding have sorts local stories about air plane eater called Slash grizzled uncle named Graymoss back mind read recent Hear RUDDER ASSEMBLY Aluminum die Available 40 60 boats Easy assemble Comes complete Mounting II Plate Screws Pivot Bracket Rudder Blade Pivot Pin n Bushings Water Pick up aded adjustable 40 60 Rudder iden tical except 60 Rudder Blade er DOUBLE RUDDER OUTDRIVE ASSEMBLY 40 60 boats Aluminum die cast Complete Master Bracket designed twin ribs indi vidual modification 2 Rudder Pivot Brackets 2 Retainer Plates necessary Mounting Screws Washers Also includes Adjustable Strut alled Olite Bushings Pivot Pins n Bushings 3 Control Arms screws 2 Rudder Blades 2 ARB 40 3 ARB 601 SINGIr RUDDER OUTORIVE ASSEMBLY same above except includes 1 Rudder Blade Rud der Pivot Bracket Pivpt Pin control Arm FLEX CABLE DRIVE LINE AND COMPONENTS TEFLON BUSHINGS & WASHERS STUB SHAFTS SHAFT LOG21/2 31/e FERRULES Ye newsletter Valley Forge Signal Seekers Pennsylvania edited Ray Cummings Ray described harrowing experience involving northern variety airplane eaters somewhat ed ited version follows Did ever notice lovely stand timber serves well mark line separation between Pa Turnpike start Park Im sure time another must have heard serene message quiet restling sound back flight line doing thing serve silent witness per formance. quietly waiting. patiently waiting ays waiting As long prevailing winds thing tall trees seem preoccupied January 1979 95 MOTOR MOUNT SET Die cast aluminum complete 5 Master Mount Screws Washers sert Adapter 40 60 engine Inserts can rail mounted boats confined engine placement areas FLEX CABLE AND STUB SHAFT ASSEMBLIES 3]
Edition: Model Aviation - 1979/01
Page Numbers: 20, 21, 22, 23, 24, 94, 95
Over reputation area Over 25 locally fly altitudes ol negative reoi T1i nl the qi pj th Pikes Peak 20 M ]EI -to-bi r local line-up eight club RC Club race six low drag pictures o js jointly sponsoring inds better novice iss part reguL ned QM contest n per pians owed Local hobby available Both cli agreed plani left contestant someone otherwise compete because er fly faster airplan minimum five conjunction DOWEL RH PANEL /4 BUTT RIB FIBRE GLASS 5 TA PE Ij -I---4~IIIIII kzjiz~ 1/459/16IIIItIt IIIII Jli ~11-----II 1/1653 SH II III II] II I SPARSIIIjIL HPANEL RIB I/lB I/4CAPIII DIHEDRAL jI I/4BUTT I/IS RIBS IIII lli II II ii IIZEIIII II I/IBII2SH11Ip--- ---------fl----K.I/451IIII I oITh1F IIIIII IIII j1~ 11iL D TWO PANELS BEVEL BUTT RIBS FOR DIHEDRALJDIN WITH EPOSY REINFORCE WITH FIBRE GLASS TAPE 15 ENGINE I/S STOCK6/32 BLIND 1/SPLY ROPELLER 7-4 l/Z TF BEVEL LOWER SHEET EDGE RADIO COMPARTMENT I/4L I/S PLY SERVO RAILS ______________________________________________0 SOLID TI PS IL6-32 NYLON BOLTS __________] II 3/lB DOWEL PUSH RODS SURFACES 3/18 ROUND EDGES j V DRILLL TAP 4-40~IB4-4091 2024T5 ALUMALL 4-4 DRILL 3/IS r NGINEIRHVIEWINCIDENCE&THRUSTOIQ 13/4SPINNER PUSH ROD SLOTS -3/32 TUBING 1/16 PLY NOSE RING-I/lB WIREEPOXIED ---'1/B CROSS WISE SH01/2D FAIRcWING SPAN56AREAI 505 q d R/C SPORT RACER NOSE TO SPINNERWGHT2 1/2 LBS ENG 09S JAYCOCK FEB 1978 FULL-SIZE PLANS AVAILABLESEE PAGE 112 1/2115/451.-MAPLE C 03 C 03 CD CD N tI 7-41/2 15 x 22 b 3/16 BIRCH DOWEL WING HOLD DOWNS IMBED INTO 1/4 BALSA BLOCKS LSA / / / II SQ HARD ALL 3/16 3/ Ti WAL -x 1/2 TI good c 190and arent flM racing havent sk sit Heotkamp supplied fly well look instruction Select two mi 16 X 4 X 36 sheets ote Use cyanoacrylate ept outline onto thei Transfer bulkhe \iselage formers us forniers 2 aii everything square Inwer fuselage h together fus spinner ring bottom fu landing gear blo e Epoxy -tri ring Cut out hitween spinr k so that n e mount c xl for cleara ngine Allow l/3L ick plate t rear glue firewall mount blind nuts ba firewall still place fuel tank t tuselage asi d cut out wire o not ri sturdy construction ir vacant new aparimi 24 nickle chrome plated greater wear resistance Almost crankcases die cast investment cast aluminum heat treated maximum strength piston rings used made high strength centrifugal cast iron used combination chrome plated steel sleeve Almost ideas first used Control Line Speed engines quest superior performance contin uous process Extremely high-nitro con tent fuels devilishly hard engine components ever stronger alloys design improvements developed success such work amply demon strated todays large RC engines develop over one-half horse power 10% nitro fuels run hun dreds hours before parts wear out destruct Most small engines 19 displacement less have cast iron pistons freemachining leaded steel sleeves com bination works very well cast iron wear resistant exhibits low friction cast iron heavy however almost impossible balance larger dis placement engine try use material piston reason engines 40 displacement larger have aluminum pistons ABC ABCD several manufacturers now make what called ABC engines letters stand Aluminum Brass Chrome mean engine has lapped aluminum piston chromeplated brass sleeve aluminum piston special alloy containing 19 22 per cent silicon alloy has much lower coefficient expansion regular aluminum alloys fact brass ex pands aluminum heated proper sleeve piston clear ances maintained operating conditions concept first used Super tigre 65 29 engines about ten years ago believe Dick Hall Huntsville Alabama provided information low-expansion aluminum alloy Mr Garofali worked out technique brass sleeve use racing engines lapped lightweight low-friction pis ton gave tremendous increase horse power side benefits excellent life time elimination long break-in requirements ABC sleeve piston expensive however since high sil icon alloy piston must cast chrome plating difficult hone assembly tolerances very critical reduce some costs some manufacturers made ABCD engines letters ABCD mean Aluminum Brass Chrome Dykes ring combination piston alloy either high silicon aluminum casting 2024-T35 aluminum Instead being lapped piston fitted single compression ring special type called Dykes ring Most piston rings spring loaded against walls cylinder tension creates friction drag continually piston goes up down Dykes ring however fits bore no tension depends combustion pressure force against wall sealing seals gas pressure high floats during remainder stroke great reduction friction Different rings shown Fig 5 may some differences idling characteristics between lapped ABC en gine ringed engine doubt would much detriment would guess such differences would caused change compression idling speeds Perhaps ringed piston leaks slightly low rpm low compression engines seem idle better high com pression ones theory could proven easily measuring com pression high low speeds Combustion Chambers Various combus tion chamber shapes shown Fig 6 Years ago bothered preigni tion went high compression fuels containing 50% nitro flat-top piston eliminated problem now can run extremely high com pression ratios up 80% nitro racing events successful high performance combustion chamber shape shown Fig 6-d used Supertigre engines years Wing span 67The Cuellist 2 40 has Wing chord 14seen designed Total wag area 7g5upeasy-to-f y ann safe Fse age engla 54sanding twin engined Stab lizer span 27H C mooni Combining Veric n tO Velegant appearance Hoc engine 23- 40with simple atrLcturO ta Gear F ann rerractidea tne moceler Ceanne 45w reiIwho has progrenano Control functionstnroga usaa lorons hiecatortrainers pattern Thrott e Redderow wing sport pa Coast act Ba sa 0acazea 35a67 Ins cc onwanaa ann coast oct 05 photos ac aced K acludes Deca balsa anaped pa ta ha owoon plywood a 00 pee ens Owa e d F y ng ght 6 8 05 now used Schnuerle-ported en gines distance top pis ton glow plug has great effect upon engine performance because affects tem perature engine plug other chamber shapes have tried flat area around periphery called squish band set come very close piston top stroke squishes fuel-air charge domed combustion chamber high tur bulence increased efficiency trumpet chamber shown Fig 6-f works very well used extensively Cox Rossi high-performance en gines Some hop-up experts modify squish-band chamber shown Fig 6-e claim better performance really doubt think can get iden tical better performance setting head clearance optimum compres sion ratio weather has great effect racing engines can usually correct variations weather changing compression ratio good tachometer necessary measure engine rpm vary clearance must know what rpm engine should turn required performance Sport RC engines affected weather changes compression adjustments rarely needed ends part next month will cover tuned pipes general descriptions several new engines market Spirits/Aycock continued page 24 Use 6-32 nylon bolts blind nuts hold place use nylon bolts allows gear knock off super hard landing instead tearing up bottom fuselage Epoxy maple wing blocks gussets place Square up wing fuselage drill holes wing dowels bolts See left off block front fuselage Tap blocks nylon bolts Now add forward fuselage block epoxy Install wing dowels Sand shape fuse lage fairing front end spinner Coat engine tank area resin epoxy Weight point should 15 94 Model Aviation ozs Install engine tank spinner Add RC gear locate CG shown plans Use 3/s-in throw surfaces first flights Finish favorite iron-on covering Dont forget elevator connecting wire hinges Flying piece cake airplane can driven down runway take off like car air very honest will anything dont ask Rudder rolls snap fact people will want know hid aile rons Landing dream just set up final bring home Hope too will get much enjoyment out Spirit Springs have RC Aerobatics/VanPutte continued page 25 panied Auto Mix intended situations excessive fuel sup plied engine could result too much muffler pressure applied fuel tank fuel pump set pressure too high use fuel pump standard carburetor other such situations Auto Mix returns excess fuel fuel tank net result engine thinks tank located Auto Mix use fuel pumps standard carbu retor-equipped engines Phoenix 6 airplanes Phoenix tank/engine com bination high tank sidemounted engine results tremendous height difference between centerlines tank carburetor Conse quently engine set good upright operation usually leans out severely airplane flown through verted parts maneuvers use pump engine solves problem However difficult adjust fuel pump pressure high enough guar antee fuel delivery conditions low enough needle valve settings sensitive Up now have settled having little too much pressure sensitive needle valve order guarantee reliable supply fuel Robart Auto Mix has permitted enjoy reliable fuel supply pump provides correspond ingly sensitive needle valve Contrary instructions use three-line system tank vent/overflow line attaches muffler pressure tap fill line taches excess fuel return tap Auto Mix fuel pickup line attaches Perry pump inlet tap subsequently Auto Mix course Auto Mix outlet attaches carburetor called Robart tell what done suggested Maynard Shade reason three-line system worked used Perry pump Presumably use Robart pump would require having two-line system plugging third line Filling tank little different what done previously used fill tank through fill line surprise cap line tank full Now simply remove line carburetor fill through case hadnt guessed now am completely satisfied Robart Auto Mix recommend anyone problems similar described pine trees line runway club flies have claimed share hapless airplanes Since tech nically called Slash Pines no kidding have sorts local stories about air plane eater called Slash grizzled uncle named Graymoss back mind read recent Hear RUDDER ASSEMBLY Aluminum die Available 40 60 boats Easy assemble Comes complete Mounting II Plate Screws Pivot Bracket Rudder Blade Pivot Pin n Bushings Water Pick up aded adjustable 40 60 Rudder iden tical except 60 Rudder Blade er DOUBLE RUDDER OUTDRIVE ASSEMBLY 40 60 boats Aluminum die cast Complete Master Bracket designed twin ribs indi vidual modification 2 Rudder Pivot Brackets 2 Retainer Plates necessary Mounting Screws Washers Also includes Adjustable Strut alled Olite Bushings Pivot Pins n Bushings 3 Control Arms screws 2 Rudder Blades 2 ARB 40 3 ARB 601 SINGIr RUDDER OUTORIVE ASSEMBLY same above except includes 1 Rudder Blade Rud der Pivot Bracket Pivpt Pin control Arm FLEX CABLE DRIVE LINE AND COMPONENTS TEFLON BUSHINGS & WASHERS STUB SHAFTS SHAFT LOG21/2 31/e FERRULES Ye newsletter Valley Forge Signal Seekers Pennsylvania edited Ray Cummings Ray described harrowing experience involving northern variety airplane eaters somewhat ed ited version follows Did ever notice lovely stand timber serves well mark line separation between Pa Turnpike start Park Im sure time another must have heard serene message quiet restling sound back flight line doing thing serve silent witness per formance. quietly waiting. patiently waiting ays waiting As long prevailing winds thing tall trees seem preoccupied January 1979 95 MOTOR MOUNT SET Die cast aluminum complete 5 Master Mount Screws Washers sert Adapter 40 60 engine Inserts can rail mounted boats confined engine placement areas FLEX CABLE AND STUB SHAFT ASSEMBLIES 3]
Edition: Model Aviation - 1979/01
Page Numbers: 20, 21, 22, 23, 24, 94, 95
Over reputation area Over 25 locally fly altitudes ol negative reoi T1i nl the qi pj th Pikes Peak 20 M ]EI -to-bi r local line-up eight club RC Club race six low drag pictures o js jointly sponsoring inds better novice iss part reguL ned QM contest n per pians owed Local hobby available Both cli agreed plani left contestant someone otherwise compete because er fly faster airplan minimum five conjunction DOWEL RH PANEL /4 BUTT RIB FIBRE GLASS 5 TA PE Ij -I---4~IIIIII kzjiz~ 1/459/16IIIItIt IIIII Jli ~11-----II 1/1653 SH II III II] II I SPARSIIIjIL HPANEL RIB I/lB I/4CAPIII DIHEDRAL jI I/4BUTT I/IS RIBS IIII lli II II ii IIZEIIII II I/IBII2SH11Ip--- ---------fl----K.I/451IIII I oITh1F IIIIII IIII j1~ 11iL D TWO PANELS BEVEL BUTT RIBS FOR DIHEDRALJDIN WITH EPOSY REINFORCE WITH FIBRE GLASS TAPE 15 ENGINE I/S STOCK6/32 BLIND 1/SPLY ROPELLER 7-4 l/Z TF BEVEL LOWER SHEET EDGE RADIO COMPARTMENT I/4L I/S PLY SERVO RAILS ______________________________________________0 SOLID TI PS IL6-32 NYLON BOLTS __________] II 3/lB DOWEL PUSH RODS SURFACES 3/18 ROUND EDGES j V DRILLL TAP 4-40~IB4-4091 2024T5 ALUMALL 4-4 DRILL 3/IS r NGINEIRHVIEWINCIDENCE&THRUSTOIQ 13/4SPINNER PUSH ROD SLOTS -3/32 TUBING 1/16 PLY NOSE RING-I/lB WIREEPOXIED ---'1/B CROSS WISE SH01/2D FAIRcWING SPAN56AREAI 505 q d R/C SPORT RACER NOSE TO SPINNERWGHT2 1/2 LBS ENG 09S JAYCOCK FEB 1978 FULL-SIZE PLANS AVAILABLESEE PAGE 112 1/2115/451.-MAPLE C 03 C 03 CD CD N tI 7-41/2 15 x 22 b 3/16 BIRCH DOWEL WING HOLD DOWNS IMBED INTO 1/4 BALSA BLOCKS LSA / / / II SQ HARD ALL 3/16 3/ Ti WAL -x 1/2 TI good c 190and arent flM racing havent sk sit Heotkamp supplied fly well look instruction Select two mi 16 X 4 X 36 sheets ote Use cyanoacrylate ept outline onto thei Transfer bulkhe \iselage formers us forniers 2 aii everything square Inwer fuselage h together fus spinner ring bottom fu landing gear blo e Epoxy -tri ring Cut out hitween spinr k so that n e mount c xl for cleara ngine Allow l/3L ick plate t rear glue firewall mount blind nuts ba firewall still place fuel tank t tuselage asi d cut out wire o not ri sturdy construction ir vacant new aparimi 24 nickle chrome plated greater wear resistance Almost crankcases die cast investment cast aluminum heat treated maximum strength piston rings used made high strength centrifugal cast iron used combination chrome plated steel sleeve Almost ideas first used Control Line Speed engines quest superior performance contin uous process Extremely high-nitro con tent fuels devilishly hard engine components ever stronger alloys design improvements developed success such work amply demon strated todays large RC engines develop over one-half horse power 10% nitro fuels run hun dreds hours before parts wear out destruct Most small engines 19 displacement less have cast iron pistons freemachining leaded steel sleeves com bination works very well cast iron wear resistant exhibits low friction cast iron heavy however almost impossible balance larger dis placement engine try use material piston reason engines 40 displacement larger have aluminum pistons ABC ABCD several manufacturers now make what called ABC engines letters stand Aluminum Brass Chrome mean engine has lapped aluminum piston chromeplated brass sleeve aluminum piston special alloy containing 19 22 per cent silicon alloy has much lower coefficient expansion regular aluminum alloys fact brass ex pands aluminum heated proper sleeve piston clear ances maintained operating conditions concept first used Super tigre 65 29 engines about ten years ago believe Dick Hall Huntsville Alabama provided information low-expansion aluminum alloy Mr Garofali worked out technique brass sleeve use racing engines lapped lightweight low-friction pis ton gave tremendous increase horse power side benefits excellent life time elimination long break-in requirements ABC sleeve piston expensive however since high sil icon alloy piston must cast chrome plating difficult hone assembly tolerances very critical reduce some costs some manufacturers made ABCD engines letters ABCD mean Aluminum Brass Chrome Dykes ring combination piston alloy either high silicon aluminum casting 2024-T35 aluminum Instead being lapped piston fitted single compression ring special type called Dykes ring Most piston rings spring loaded against walls cylinder tension creates friction drag continually piston goes up down Dykes ring however fits bore no tension depends combustion pressure force against wall sealing seals gas pressure high floats during remainder stroke great reduction friction Different rings shown Fig 5 may some differences idling characteristics between lapped ABC en gine ringed engine doubt would much detriment would guess such differences would caused change compression idling speeds Perhaps ringed piston leaks slightly low rpm low compression engines seem idle better high com pression ones theory could proven easily measuring com pression high low speeds Combustion Chambers Various combus tion chamber shapes shown Fig 6 Years ago bothered preigni tion went high compression fuels containing 50% nitro flat-top piston eliminated problem now can run extremely high com pression ratios up 80% nitro racing events successful high performance combustion chamber shape shown Fig 6-d used Supertigre engines years Wing span 67The Cuellist 2 40 has Wing chord 14seen designed Total wag area 7g5upeasy-to-f y ann safe Fse age engla 54sanding twin engined Stab lizer span 27H C mooni Combining Veric n tO Velegant appearance Hoc engine 23- 40with simple atrLcturO ta Gear F ann rerractidea tne moceler Ceanne 45w reiIwho has progrenano Control functionstnroga usaa lorons hiecatortrainers pattern Thrott e Redderow wing sport pa Coast act Ba sa 0acazea 35a67 Ins cc onwanaa ann coast oct 05 photos ac aced K acludes Deca balsa anaped pa ta ha owoon plywood a 00 pee ens Owa e d F y ng ght 6 8 05 now used Schnuerle-ported en gines distance top pis ton glow plug has great effect upon engine performance because affects tem perature engine plug other chamber shapes have tried flat area around periphery called squish band set come very close piston top stroke squishes fuel-air charge domed combustion chamber high tur bulence increased efficiency trumpet chamber shown Fig 6-f works very well used extensively Cox Rossi high-performance en gines Some hop-up experts modify squish-band chamber shown Fig 6-e claim better performance really doubt think can get iden tical better performance setting head clearance optimum compres sion ratio weather has great effect racing engines can usually correct variations weather changing compression ratio good tachometer necessary measure engine rpm vary clearance must know what rpm engine should turn required performance Sport RC engines affected weather changes compression adjustments rarely needed ends part next month will cover tuned pipes general descriptions several new engines market Spirits/Aycock continued page 24 Use 6-32 nylon bolts blind nuts hold place use nylon bolts allows gear knock off super hard landing instead tearing up bottom fuselage Epoxy maple wing blocks gussets place Square up wing fuselage drill holes wing dowels bolts See left off block front fuselage Tap blocks nylon bolts Now add forward fuselage block epoxy Install wing dowels Sand shape fuse lage fairing front end spinner Coat engine tank area resin epoxy Weight point should 15 94 Model Aviation ozs Install engine tank spinner Add RC gear locate CG shown plans Use 3/s-in throw surfaces first flights Finish favorite iron-on covering Dont forget elevator connecting wire hinges Flying piece cake airplane can driven down runway take off like car air very honest will anything dont ask Rudder rolls snap fact people will want know hid aile rons Landing dream just set up final bring home Hope too will get much enjoyment out Spirit Springs have RC Aerobatics/VanPutte continued page 25 panied Auto Mix intended situations excessive fuel sup plied engine could result too much muffler pressure applied fuel tank fuel pump set pressure too high use fuel pump standard carburetor other such situations Auto Mix returns excess fuel fuel tank net result engine thinks tank located Auto Mix use fuel pumps standard carbu retor-equipped engines Phoenix 6 airplanes Phoenix tank/engine com bination high tank sidemounted engine results tremendous height difference between centerlines tank carburetor Conse quently engine set good upright operation usually leans out severely airplane flown through verted parts maneuvers use pump engine solves problem However difficult adjust fuel pump pressure high enough guar antee fuel delivery conditions low enough needle valve settings sensitive Up now have settled having little too much pressure sensitive needle valve order guarantee reliable supply fuel Robart Auto Mix has permitted enjoy reliable fuel supply pump provides correspond ingly sensitive needle valve Contrary instructions use three-line system tank vent/overflow line attaches muffler pressure tap fill line taches excess fuel return tap Auto Mix fuel pickup line attaches Perry pump inlet tap subsequently Auto Mix course Auto Mix outlet attaches carburetor called Robart tell what done suggested Maynard Shade reason three-line system worked used Perry pump Presumably use Robart pump would require having two-line system plugging third line Filling tank little different what done previously used fill tank through fill line surprise cap line tank full Now simply remove line carburetor fill through case hadnt guessed now am completely satisfied Robart Auto Mix recommend anyone problems similar described pine trees line runway club flies have claimed share hapless airplanes Since tech nically called Slash Pines no kidding have sorts local stories about air plane eater called Slash grizzled uncle named Graymoss back mind read recent Hear RUDDER ASSEMBLY Aluminum die Available 40 60 boats Easy assemble Comes complete Mounting II Plate Screws Pivot Bracket Rudder Blade Pivot Pin n Bushings Water Pick up aded adjustable 40 60 Rudder iden tical except 60 Rudder Blade er DOUBLE RUDDER OUTDRIVE ASSEMBLY 40 60 boats Aluminum die cast Complete Master Bracket designed twin ribs indi vidual modification 2 Rudder Pivot Brackets 2 Retainer Plates necessary Mounting Screws Washers Also includes Adjustable Strut alled Olite Bushings Pivot Pins n Bushings 3 Control Arms screws 2 Rudder Blades 2 ARB 40 3 ARB 601 SINGIr RUDDER OUTORIVE ASSEMBLY same above except includes 1 Rudder Blade Rud der Pivot Bracket Pivpt Pin control Arm FLEX CABLE DRIVE LINE AND COMPONENTS TEFLON BUSHINGS & WASHERS STUB SHAFTS SHAFT LOG21/2 31/e FERRULES Ye newsletter Valley Forge Signal Seekers Pennsylvania edited Ray Cummings Ray described harrowing experience involving northern variety airplane eaters somewhat ed ited version follows Did ever notice lovely stand timber serves well mark line separation between Pa Turnpike start Park Im sure time another must have heard serene message quiet restling sound back flight line doing thing serve silent witness per formance. quietly waiting. patiently waiting ays waiting As long prevailing winds thing tall trees seem preoccupied January 1979 95 MOTOR MOUNT SET Die cast aluminum complete 5 Master Mount Screws Washers sert Adapter 40 60 engine Inserts can rail mounted boats confined engine placement areas FLEX CABLE AND STUB SHAFT ASSEMBLIES 3]